Application of 5975-12-2 , The common heterocyclic compound, 5975-12-2, name is 2,4-Dichloro-3-nitropyridine, molecular formula is C5H2Cl2N2O2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.
b) Synthesis of 4-chloro-3-nitro-pyridin-2-ol 2,4-dichloro-3-nitro-pyridine (4.01 g, 20.8 mmol) and cesium acetate (8.0 g, 41.6 mmol) were dissolved in anhydrous N,N-dimethyl formamide (104 ml) under nitrogen atmosphere, and the reaction mixture was heated to 800 and stirred for 18 hours. The reaction mixture was cooled to room temperature the reaction was quenched by adding water. The organic layer was extracted with ethyl acetate, and the combined organic layer was washed with water and saturated saline solution, dried over anhydrous sodium sulfate (Na2SO4), filtered and evaporated under reduced pressure to obtain pale-yellow solid (1.69 g, 47%). 1H-NMR (DMSO-d6, 300 MHz); delta=8.24 (d, J=5.7 Hz, 1H), 7.09 (d, J=5.7 Hz, 1H).
The synthetic route of 5975-12-2 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Ahn, Sung Oh; Park, Chan Hee; Im, Jun Hwan; Lee, Soon Ok; Lee, Kyoung June; Cho, Seong Wook; Ko, Kwang Seok; Han, Sun Young; Lee, Won Il; US2011/28467; (2011); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem